code: def test_empty_df_set_operations(
      set_operation: str, dtype: pl.DataType
  ) -> None:
      expr = getattr(pl.col("list1").list, set_operation)(
          pl.col("list2")
      )
      df = pl.DataFrame(
          [], {"list1": pl.List(dtype), "list2": pl.List(dtype)}
      )
      assert df.select(expr).is_empty()
  
file_path: polars/py-polars/tests/unit/test_empty.py
imports: import pytest
  import polars
  from polars.testing import assert_frame_equal, assert_series_equal
label_desc: Use image node_id 9 for calling a global function with example usage: test_empty_df_set_operations(set_operation, dtype) without return types